e1000e: properly bounds-check string functions
Use string functions with bounds checking rather than their non-bounds
checking counterparts, and do not hard code these boundaries.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Emil Tantilov <emil.s.tantilov@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/e1000e/ethtool.c b/drivers/net/e1000e/ethtool.c
index affcacf..c942cca 100644
--- a/drivers/net/e1000e/ethtool.c
+++ b/drivers/net/e1000e/ethtool.c
@@ -624,20 +624,24 @@
struct e1000_adapter *adapter = netdev_priv(netdev);
char firmware_version[32];
- strncpy(drvinfo->driver, e1000e_driver_name, 32);
- strncpy(drvinfo->version, e1000e_driver_version, 32);
+ strncpy(drvinfo->driver, e1000e_driver_name,
+ sizeof(drvinfo->driver) - 1);
+ strncpy(drvinfo->version, e1000e_driver_version,
+ sizeof(drvinfo->version) - 1);
/*
* EEPROM image version # is reported as firmware version # for
* PCI-E controllers
*/
- sprintf(firmware_version, "%d.%d-%d",
+ snprintf(firmware_version, sizeof(firmware_version), "%d.%d-%d",
(adapter->eeprom_vers & 0xF000) >> 12,
(adapter->eeprom_vers & 0x0FF0) >> 4,
(adapter->eeprom_vers & 0x000F));
- strncpy(drvinfo->fw_version, firmware_version, 32);
- strncpy(drvinfo->bus_info, pci_name(adapter->pdev), 32);
+ strncpy(drvinfo->fw_version, firmware_version,
+ sizeof(drvinfo->fw_version) - 1);
+ strncpy(drvinfo->bus_info, pci_name(adapter->pdev),
+ sizeof(drvinfo->bus_info) - 1);
drvinfo->regdump_len = e1000_get_regs_len(netdev);
drvinfo->eedump_len = e1000_get_eeprom_len(netdev);
}
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 5498689..98729a6 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -5639,7 +5639,7 @@
ret_val = e1000_read_pba_string_generic(hw, pba_str,
E1000_PBANUM_LENGTH);
if (ret_val)
- strcpy(pba_str, "Unknown");
+ strncpy((char *)pba_str, "Unknown", sizeof(pba_str) - 1);
e_info("MAC: %d, PHY: %d, PBA No: %s\n",
hw->mac.type, hw->phy.type, pba_str);
}
@@ -5968,7 +5968,7 @@
if (!(adapter->flags & FLAG_HAS_AMT))
e1000_get_hw_control(adapter);
- strcpy(netdev->name, "eth%d");
+ strncpy(netdev->name, "eth%d", sizeof(netdev->name) - 1);
err = register_netdev(netdev);
if (err)
goto err_register;